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Linux Distros Unpatched Vulnerability : CVE-2026-22995

🗓️ 23 Jan 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 3 Views

Unpatched CVE-2026-22995 in ublk may cause use-after-free during partition scan; fix uses disk refs.

Related
Refs
Code
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-22995
23 Jan 202615:24
attackerkb
AstraLinux
Astra Linux - уязвимость в linux-5.10
20 May 202605:53
astralinux
Circl
CVE-2026-22995
23 Jan 202617:00
circl
CNNVD
Linux Kernel Security Vulnerabilities
23 Jan 202600:00
cnnvd
CVE
CVE-2026-22995
23 Jan 202615:24
cve
Cvelist
CVE-2026-22995 ublk: fix use-after-free in ublk_partition_scan_work
23 Jan 202615:24
cvelist
Debian CVE
CVE-2026-22995
23 Jan 202615:24
debiancve
EUVD
EUVD-2026-4282
23 Jan 202615:24
euvd
NVD
CVE-2026-22995
23 Jan 202616:15
nvd
OSV
BELL-CVE-2026-22995 CVE-2026-22995 does not affect BellSoft software
24 Jan 202606:08
osv
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
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  - In the Linux kernel, the following vulnerability has been resolved: ublk: fix use-after-free in
    ublk_partition_scan_work A race condition exists between the async partition scan work and device teardown
    that can lead to a use-after-free of ub->ub_disk: 1. ublk_ctrl_start_dev() schedules partition_scan_work
    after add_disk() 2. ublk_stop_dev() calls ublk_stop_dev_unlocked() which does: - del_gendisk(ub->ub_disk)
    - ublk_detach_disk() sets ub->ub_disk = NULL - put_disk() which may free the disk 3. The worker
    ublk_partition_scan_work() then dereferences ub->ub_disk leading to UAF Fix this by using
    ublk_get_disk()/ublk_put_disk() in the worker to hold a reference to the disk during the partition scan.
    The spinlock in ublk_get_disk() synchronizes with ublk_detach_disk() ensuring the worker either gets a
    valid reference or sees NULL and exits early. Also change flush_work() to cancel_work_sync() to avoid
    running the partition scan work unnecessarily when the disk is already detached. (CVE-2026-22995)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "linux-hwe-edge"}
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  "Ubuntu Linux-18.04": {
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          {"reference": "linux-riscv-6.14"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-tools-6.8.0"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}

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04 Mar 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.8
EPSS0.00025
3